Objective lens for a microscope



FIG. 1 is a top front perspective view of an objective lens for a microscope, showing our new design;

FIG. 2 is a bottom rear perspective thereof;

FIG. 3 is a front elevation thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear elevation thereof;

FIG. 7 is a left side elevation thereof; and

FIG. 8 is a right side elevation thereof. 

The ornamental design for an objective lens for a microscope, as shown. 